AR022335A1 - METHOD FOR AUDIO DECODING - Google Patents

METHOD FOR AUDIO DECODING

Info

Publication number
AR022335A1
AR022335A1 ARP000100351A ARP000100351A AR022335A1 AR 022335 A1 AR022335 A1 AR 022335A1 AR P000100351 A ARP000100351 A AR P000100351A AR P000100351 A ARP000100351 A AR P000100351A AR 022335 A1 AR022335 A1 AR 022335A1
Authority
AR
Argentina
Prior art keywords
segments
frames
audio
information
sequence
Prior art date
Application number
ARP000100351A
Other languages
Spanish (es)
Original Assignee
Dolby Lab Licensing Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Dolby Lab Licensing Corp filed Critical Dolby Lab Licensing Corp
Publication of AR022335A1 publication Critical patent/AR022335A1/en

Links

Classifications

    • G—PHYSICS
    • G10—MUSICAL INSTRUMENTS; ACOUSTICS
    • G10L—SPEECH ANALYSIS TECHNIQUES OR SPEECH SYNTHESIS; SPEECH RECOGNITION; SPEECH OR VOICE PROCESSING TECHNIQUES; SPEECH OR AUDIO CODING OR DECODING
    • G10L19/00—Speech or audio signals analysis-synthesis techniques for redundancy reduction, e.g. in vocoders; Coding or decoding of speech or audio signals, using source filter models or psychoacoustic analysis
    • G—PHYSICS
    • G10—MUSICAL INSTRUMENTS; ACOUSTICS
    • G10L—SPEECH ANALYSIS TECHNIQUES OR SPEECH SYNTHESIS; SPEECH RECOGNITION; SPEECH OR VOICE PROCESSING TECHNIQUES; SPEECH OR AUDIO CODING OR DECODING
    • G10L19/00—Speech or audio signals analysis-synthesis techniques for redundancy reduction, e.g. in vocoders; Coding or decoding of speech or audio signals, using source filter models or psychoacoustic analysis
    • G10L19/02—Speech or audio signals analysis-synthesis techniques for redundancy reduction, e.g. in vocoders; Coding or decoding of speech or audio signals, using source filter models or psychoacoustic analysis using spectral analysis, e.g. transform vocoders or subband vocoders
    • G10L19/022—Blocking, i.e. grouping of samples in time; Choice of analysis windows; Overlap factoring
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
    • H04N21/20—Servers specifically adapted for the distribution of content, e.g. VOD servers; Operations thereof
    • H04N21/23—Processing of content or additional data; Elementary server operations; Server middleware
    • H04N21/233—Processing of audio elementary streams

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Signal Processing (AREA)
  • Multimedia (AREA)
  • Computational Linguistics (AREA)
  • Health & Medical Sciences (AREA)
  • Audiology, Speech & Language Pathology (AREA)
  • Human Computer Interaction (AREA)
  • Acoustics & Sound (AREA)
  • Spectroscopy & Molecular Physics (AREA)
  • Compression, Expansion, Code Conversion, And Decoders (AREA)
  • Compression Or Coding Systems Of Tv Signals (AREA)

Abstract

Un método de decodificacion de audio en el cual un codificador de audio aplica un proceso de codificacion de bloques adaptativo a segmentos de informacionde audio para generar cuadros de informacion codificada que estén alineados con una senal deref erencia que lleva la alineacion de una secuencia de cuadros deinformacion de video. La informacion de audio es analizada para determinar diversas características de la senal de audio, tales como la aparicion deubicacion de un transitorio, y segenera una senal de control que causa que el proceso de codificacion de bloques adaptativo codifique segmentos de longitudvariable. Un decodificador complementario aplica un proceso de decodificacion de bloques adaptativo para recuperar lossegmentos de in formacion de audio de loscuadros de informacion codificada. En realizaciones que aplican transformadas de cancelacion de distorsion por bordes dentados en el dominio de tiempo, seaplican funciones de ventana y transformadas deacuerdo a una de una pl uralidad de modelos de segmentos que definen funciones de ventana y parámetros detransformada para cada segmento en una secuencia de segmentos. Los segmentos en cada cuadro de una secuencia de cuadros solapantes pueden serrecuperados sinsenales espu reas de distorsion por bordes dentados independientemente de la recuperacion de segmentos en otros cuadros. Las funciones de ventana estánadaptados para que proporcionen respuesta de dominio de frecuencia preferidas, yperfiles de ganancia en el domi nio del tiempo.An audio decoding method in which an audio encoder applies an adaptive block coding process to segments of audio information to generate frames of encoded information that are aligned with a reference signal that leads to the alignment of a sequence of information frames Of video. The audio information is analyzed to determine various characteristics of the audio signal, such as the appearance of a transient location, and a control signal is generated that causes the adaptive block coding process to encode segments of variable length. A complementary decoder applies an adaptive block decoding process to retrieve the audio information segments of the encoded information frames. In embodiments that apply distortion edge transform transformations in the time domain, window functions and transformations are applied according to one of a plurality of segment models defining window functions and parameters transformed for each segment in a sequence of segments The segments in each frame of a sequence of overlapping frames can be recovered without distorted spurious edges by serrated edges regardless of the recovery of segments in other frames. The window functions are adapted to provide preferred frequency domain response, and gain profiles over time.

ARP000100351A 1999-01-28 2000-01-27 METHOD FOR AUDIO DECODING AR022335A1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US09/239,345 US6226608B1 (en) 1999-01-28 1999-01-28 Data framing for adaptive-block-length coding system

Publications (1)

Publication Number Publication Date
AR022335A1 true AR022335A1 (en) 2002-09-04

Family

ID=22901762

Family Applications (1)

Application Number Title Priority Date Filing Date
ARP000100351A AR022335A1 (en) 1999-01-28 2000-01-27 METHOD FOR AUDIO DECODING

Country Status (18)

Country Link
US (1) US6226608B1 (en)
EP (1) EP1151435B1 (en)
JP (1) JP4540232B2 (en)
KR (1) KR100702058B1 (en)
CN (1) CN1255809C (en)
AR (1) AR022335A1 (en)
AT (1) ATE223612T1 (en)
AU (1) AU771332B2 (en)
BR (1) BR0007775A (en)
CA (1) CA2354396C (en)
DE (1) DE60000412T2 (en)
DK (1) DK1151435T3 (en)
ES (1) ES2179018T3 (en)
HK (1) HK1043429B (en)
MX (1) MXPA01007547A (en)
MY (1) MY128069A (en)
TW (1) TW519629B (en)
WO (1) WO2000045389A1 (en)

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Also Published As

Publication number Publication date
WO2000045389A1 (en) 2000-08-03
CA2354396A1 (en) 2000-08-03
TW519629B (en) 2003-02-01
AU771332B2 (en) 2004-03-18
DE60000412D1 (en) 2002-10-10
BR0007775A (en) 2002-02-05
JP4540232B2 (en) 2010-09-08
EP1151435A1 (en) 2001-11-07
MXPA01007547A (en) 2002-07-02
HK1043429B (en) 2006-10-06
KR20010101749A (en) 2001-11-14
ES2179018T3 (en) 2003-01-16
AU2621500A (en) 2000-08-18
CN1255809C (en) 2006-05-10
KR100702058B1 (en) 2007-03-30
US6226608B1 (en) 2001-05-01
CN1338104A (en) 2002-02-27
HK1043429A1 (en) 2002-09-13
CA2354396C (en) 2008-10-21
JP2002536681A (en) 2002-10-29
ATE223612T1 (en) 2002-09-15
EP1151435B1 (en) 2002-09-04
MY128069A (en) 2007-01-31
DE60000412T2 (en) 2003-08-07
DK1151435T3 (en) 2002-10-14

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